|Yinlong downsi hunkering down with its babies. Reconstruction by Christopher DiPiazza.|
|Yinlong downsi skull. See the beak?|
Unlike its later relatives, Yinlong was not an obligate quadruped, and could walk on its hind legs because its skull wasn't so large in proportion to the rest of its body (later ceratopsids have huge heads). Like its relatives, however, it still possesses a curved beak on the tip of its mouth called a rostral bone, a feature only found in ceratopsian dinosaurs.
That's all for this week! As always message in the comments below or comment on our facebook page if you would like to request an animal to be reviewed!
Xu, X., Forster, C.A., Clark, J.M., and Mo, J. (2006). "A basal ceratopsian with transitional features from the Late Jurassic of northwestern China." Proceedings of the Royal Society B: Biological Sciences, 273(1598): 2135-2140. doi:10.1098/rspb.2006.3566
You H., Xu X. & Wang X. 2003. "A new genus of Psittacosauridae (Dinosauria: Ornithopoda) and the origin and early evolution of marginocephalian dinosaurs." Acta Geologica Sinica (English edition) 77: 15–20
Zhao X., Cheng Z., & Xu X. 1999. "The earliest ceratopsian from the Tuchengzi Formation of Liaoning, China." Journal of Vertebrate Paleontology 19(4): 681-691.